Title

Modification of the absorption cycle for low generator firing temperatures

Abstract

Analysis of a solar/electric hybrid absorption cooling system using lithium bromide and water is presented. Addition of a compressor between the evaporator and the absorber allows the system to maintain system capacity in spit of lower generator firing temperatures provided by flat plate collectors. With the compressor added, the evaporator maintains design pressure and temperature, but increased pressure in the absorber shifts the equilibrium concentration, increasing the amount of refrigerant absorbed. Thus, the solution enters the generator at a more dilute concentration than the case without the compressor. Preliminary analysis shows that less than 250 W to the compressor is needed to increase capacity to 3.52 kW (one ton) from 0.81 kW for typical operating conditions. The system coefficient of performance also increases. Other compressor issues such as leakage and impeller design are discussed. This design modification improves the feasibility of absorption cooling for use with standard low temperature flat plate collectors.

Publication Date

1-1-1994

Publication Title

ASME-JSES-JSME International Solar Energy Conference

Number of Pages

367-372

Document Type

Article

Identifier

scopus

Socpus ID

0028016809 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0028016809

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